<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        // var reversrArr = {
        //     age: 'zs',
        //     fn: function() {

        //     }
        // }
        // revaersArr = {

        // }
        // const 声明常量
        // const uname = 'zs'
        // uname = 'lisi'
        // console.log(uname)
        // const 声明的如果是对象，可以改变对象里面的属性  但是不能重新改变对象本身
        const student = {
                uname: 'zs',
                age: 18
            }
            // student.age = 20
            // console.log(student)
            // student = {

        // }
    </script>
</body>

</html>